13. Object X travels across a horizontal surface and collides with object Y. The velocity as a function of time for object X and object Y before, during, and after the collision is shown in the graph. Both objects have a mass of 2 kg. Which of the following correctly describes the momentum p of the system and the kinetic energy KE of the system? * 5 Object X o Object Y 4 ... 3 o o -2수 ㅇ -3 0.2 0.4 0.6 Time (s) 0.8 1.0 (A) p is conserved KE is conserved (B) p is conserved KE is not conserved (C) p is not conserved KE is conserved (C) p is not conserved KE is not conserved Velocity (m/s)

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